The actual List interface in the java.util package has several methods beyond the ones implemented in this chapter. Write a version of LinkedList<E> that adds some or all of these methods. The methods to add are the following (some headers are slightly modified; see the Java API Specification for descriptions of each method):
• public void addAll(int index, List<E> list)
• public boolean containsAll(List<E> list)
• public boolean equals(Object o)
• public int lastIndexOf(Object o)
• public boolean remove(Object o)
• public void removeAll(List<E> list)
• public void retainAll(List<E> list)
• public Object[] toArray()
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